Box-shook machine.



E. L. CLARK.

BOX SHDOK MACHINE.

APPLICATION FILED NOV. 30. m2.

Patented May 7,1918.

nnrrnn ea eries rern rr ERNEST IJ- CLARK, OF ST. MARIES, IDAHO.

BOX-SHOCK MACHINE.

Application filed November 30, 1917.

To all whom it may concern:

Be it known that I, ERNEST L. CLARK, a citizen of the United States, residing at St. Maries, in the county of Benewah and State of Idaho, have invented certain new and useful Improvements in Box-Shook Machines, of which the following is a specification.

My present invention relates to improvements in box shook machines, as embodied in my pending application for patent Ser. No. 163,843, filed April 20, 1917.

The present invention is designed for the purpose of saving both time and labor in the cutting or slicing of slabs of wood from quartered logs to be used as portions of packing or other boxes, and the primary object of the invention is to provide means for trimming the ends or end edges of these slabs coincident with the actual slicing of the slab from the wood stock. To this end, I employ in connection with the reciprocable frame of the slicing knife, a pair of spaced cutters or knives that act on the wood ahead of the slicing knife, and cut a kerf or groove in the slab at points that define the length of the slab. Thus after the two outters have cut the end kerfs in the face of the slab, the slicing knife follows and slices elf the slab between these two kerfs, with the result that the slab is completed as it comes from the knives, with both its ends trimmed, and ready for use.

The invention consists in certain c0mbi nations and arrangements of parts for accomplishing the above purpose as will be hereinafter described and claimed.

In the accompanying drawings l have illustrated one complete example of the physical. embodiment of my invention constructed and arranged according to the best mode 1 have so far devised for the practical application of the principles of my invention, and this exemplification of the machine has been and is now in successful operation.

Figure 1 is a front elevation of a reciprocable slicing knife and its frame, with the cutting knives of my present invention adapted thereto.

Fig. 2 is a vertical sectional view of the structure of Fig. 1 on line 2-2.

Fig. 3 is an enlarged side view of the knife holderand its knife, showing the holder attached to a frame bar.

Specification of Letters Patent;

Patented may F, 19. 1%.

Serial no. 204,711.

device of derstood that the cutter or cutters of the present invention may be applied to other reciprocable frames and knives to which they are adapted. The frame 1 inthis instance is reciprocated, vertically, by power applied to the draw rod 3, and the knife 2 as it descends, slices or cuts a slab from the quartered log of Wood 4, supported on the table 5.

1n utilizing my invention with this slicing knife it is my purpose to segregate the completed slab at one downward stroke of the frameand its knives, thus cutting and trimming the slab ready for use. In carrying out the invention T have utilized two trimming knives indicated at 6 and 6, but inasmuch as they are of similar construction, a description of one will suflice for both.

The trimming knives are attached to the cross bar 7 of the slicing knife frame, the holders 6 being grooved at 6 to fit over the frame bar, and a plate 8 with bolts 9 and nuts 10 being employed to securely attach the holder 6, or 6, as the case may be, to this cross bar.

The trimming knife has a rounded-end cutting-edge 11 formed at the end of the shank 12, the edge extending all around the curved end of the blade and the blade is pointed on both sides and back a considerable distance from the extreme cutting end, so that the blade may be reversed for use when desired, to prolong its service.

The trimming knife is retained in the cutter head 13 formed by the two grooved plates 14 and 15 that are clamped over the shank 12 through the instrumentality of the bolts 16 and nuts 16, theformer passing through the plate 15 and the latter clamping the parts together.

The plate 14 has a centrally located threaded bolt 1?, boss 18, and a lug l9, and when the head is seated in. the open slot 20 its head on the return stroke. 011 its Workof the holder, the bolt 17 projects through the central perforation 21 in the holder, and a clamping nut 17 is employed to rigidly retain the knife and its head against Wabbling, or lateral movement, but permits the head and knife to have an oscillatory movement when required. I

At 22 the holder is countersunk to provide a recess orpocket for a coiled spring 23 having one end secured to the holder at 24,

and its other end is to be attached to the lug 19' on the boss 18 of the bolt 17 on v plate 14.

From this description it Will readily appear that the knife head is seated in the open slot 20, and the coiled spring is designed to permit movement of the knife and the Wood, enter therein and cut the kerfs,

as shown in Fig. 2, some distance before the slicing knife encounters the Wood. But befdre the two trimming knives pass through from top to bottom of the Wood stock the slicing knife enters and begins to sever the slab from the Wood stock between the previously cut kerfs, and when the slicing knife emerges from the Work, the two ends of the slab have been trimmed and the slab is cut from the wood completely trimmed. ()n the return stroke of the slicing knife and its frame, the two trin'nning knives may be turned back, as they encounter and travel across the face of the slab, against the tension of the coiled spring 23, thus proventing breaking or otherwise damaging the knives or cutters.

By utilizing this invention as described, a complete shook, as regards its thickness and length, is completed at one operation of the machine, and the ends of the shook or slab are trimmed or finished ready for use, thus eliminating the necessity for machinery, or manual labor, that are usually required to complete th slab after it has been sliced from the stock.

What I claim is 1. The combination with a rcciprocablc slicing knife and its frame, of a pair of spaced knife holders secured to the frame and provided with grooved ends, an oscillatable knife head retained in each grooved end and a knife with a rounded edge carried by each head, and resilent means be tween the heads and grooved ends to permit return strokes of the knives as described.

2. The combination with a knife holder having agrooved end and a countersunk opening, a head swiveled in the opening and a coiled spring engaging the head and countersunk portion, a knife secured in the head having a rounded cutting edge, and shoulders in the grooved end to limit movement of the head.

In testimony whereof I afiix my signature.

ERNEST L. CLARK.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Iatents.

- Washington, D. 0. 

